Rotary engine



J. SOLLAZZO.

ROTARY ENGINE.

APPLRCATION FILED APR.4. 1919 1 ,305, 3 1 4. Patented June 3, 1919.

2 SHEETS-SHEET INVENTOR MZhz Via/@220 J. SULLAZZO.

ROTARY ENGINE.

APPLICATION FILED APR. 4. 19m.

Patented June 3, 1919.

2 SHEETS-SHEET 2- a INVENTOR Ja'hz JaZ/azzo it Q. BY

ATTORNZ 5 JOHN SOLLAZZO, OF PORT RICHMOND. NEW YORK.

ROTARY ENGINE.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed April 4, 1919. Serial No. 287,530.

To all whom it may concern:

Be it known that I, JOHN SOLLAZZO, a citizen of the United States of America, residing at Port Richmond, Staten Island, New York, have invented a new and useful Rotary Engine, of which the following is a specification.

My invention relates to motive apparatus of the rotary engine type, and the general objects of the invention are to provide sim ple and efficient mechanism of this character.

More specific objects are to utilize the power, such as the expansive force of the steam, to the fullest possible extent, to secure quiet, smooth action of the parts and to overcome many of the objections which have heretofore been present in devices of the character under consideration.

Briefly, the invention comprises the combination of a casing and a rotary element therein, said rotary element having both high and low pressure annular chambers therein and. sliding pistons extensible out into said chambers, and the casing having abutments disposed in the high and low pressure chambers and carrying tracks for guiding the pistons beneath the abutments.

Another feature of the invention is a special construction of reversing valve, and still other features will appear as the specification proceeds.

In the accompanying drawing I have illustrated the invention embodied in one of its practical forms, wherein:

Figure 1 is a vertical sectional view of the engine.

Fig. 2 is a diagrammatic view to illustrate more clearly the flow of the propelling fluid.

Referring now more specifically to the drawing: The numeral 5 designates the easing and 6 the rotary element journaled within the casing and supported on suitable shafting 8.

The rotary element is provided in its peripheral portion with an annular chamber 9 shown as flattened or substantially oval in cross section, and within this chamber there is supported a corresponding shaped abutment 10 which is fixed to the casing. This abutment therefore remains stationary while the chambered element rotates thereabout. Suitable acking is preferably provided with the inl t and exhaust sides of the abutment, the same being shown in the form of piston rings 11 held by an overlying strap or straps 12.

The casing is provided with an annular web or flange 13 projecting in between the two halves of the rotary element, and this web is provided for a portion of its length, at opposite sides of the abutment with an undercut trackway 14, said track being inclined or curved from points at opposite sides of the abutment inwardly beneath and under the abutment.

orking within the rotary element are the sliding pistons 15, said pistons fitting witlii'n slots 16 provided therefor in the rotary element and being drawn outward by the bolts 17 having the pivoted shoes or heads 18 working in the undercut track, said bolts carrying springs 19 at their inner ends for drawing the pistons yieldingly outward.

The engine disclosed is of the compound type, the rotary element for the purpose being provided with both high and low pressure annular chambers 9, and the casing having high and low pressure abutments respectively seated in said chambers.

The tracks described draw the pistons yieldingly outward into the expansion chambers and cause the pistons to recede as they approach the abutments, so as to pass beneath the abutments and then again emerge into the expansion chamber at the far side of the abutments.

Packing is provided to prevent the escape of steam through the undercut track between the opposite sides of the abutment. This packing is shown in the form of slides 20 working in the slots 21 provided therefor and having inclined laterally projecting spring arms for forcing the slides outward and providing also cam surfaces to be engaged by the bolt heads, as the pistons pass beneath the abutment.

Leakage is prevented at the points of con tact between the rotary element and casing by providing the undercut channels 22 at opposite sides of the inwardly projecting web or flange 13 and by providing the packing strips or runners 23 carried by the rotary element, working in said undercut grooves.

The compound action will be understood from a consideration of Fig. 2 which represents a more or less diagrammatic view of the high and low pressure sections of the engine. The steam enters the high pressure side through a supply main d4 passing through a port 25 in a reversing valve All, and through a passage 27 in the casing at the left hand side of the high pressure abutment. At the exhaust side the steam escapes by passage 28 at the opposite side of the abutment and flows through a conduit 29 and through a port 30 in the valve slide 26, passage 31, port 32 and passage into the left hand side of the low pressure casing, the steam exhausting from this low pressure side of the engine through passage 34, port 35 and conduit 36 into the passage 37 leading to the condenser. Reversal of the engine is a( -eo1nplislied by drawing the slide valve outward by means of handle 38 thereby bringing ports 25, 38, 35 and 32 into registry with conduits 39, 40, 41 and 42 respectively, the steam exhausting in this case from the left hand side of the low pressure casing by way of assage direct into the condenser outlet 3 The high and low pressure sections of the rotating element are shown secured together by means of through bolts 43, and relative rotation of these two elements is guarded against by the insertion of keys .44 in regis tering openings in the abutting faces of the two elements.

I claim:

1. In a rotary engine, the combination of a casing, a rotary element journaled in said casing and provided with an annular chamher, an abutment disposed Within said chamber and supported by the casing, a sliding piston carried by the rotary element and extensible out into the annular chamber, and a web on the casing provided with a track at opposite sides of the abutment extending from the outer periphery of the annular chamber beneath the abutment for depressing the sliding piston to cause the same to pass beneath the abutment in the revo lution of the rotary element.

2. In a rotary engine, the combination of a casing, a rotary element journaled in said casing and provided with an annular chamher, an abutment disposed Within said chamberand supported by the casing, a sliding piston carried by the rota element and extensible out into the annu ar chamber, a web on the casing provided withan undercut track extending from the outer periphery of the annular chamber beneath the abutment, and aheaded element on the outer edge of the sliding piston Working in said undercut track.

3. In a rotary engine, the combination of a casing, a rotary element journaled in said casing and provided with an annular chamher, an abutment disposed Within said chamber and supported by the casing, a sliding piston carried by the rotary element and extensible out into the annular chamber, a Web 011 the casing provided with an undercut track extending from the outer periplr cry of the annular rhalnber benealh lhv abutment, a bolt engaged in the headed piston having a head working in the undercut track, and a spring interposed between the bolt and piston for yieldingly drawing the piston outward.

4. In a rotary en ine, the combination of a casing, a rotary e ement journaled in said casing and provided with an annular chamber, an abutment disposed within said chamber and supported by the casing, 21 slidin piston carried by the rotary element an extensible out into the annular chamber, a web on the casing provided with an undercut track extending from the outer periphery of the annular chamber beneath the abutment, a headed element on the outer edge of the sliding piston working in said undercut track, and a packing slide mounted in the abutment intersecting the undercut track therein.

5. In a combination like that set forth in claim 4, inclined arms extending in opposite directions from the aeking slide and ar ranged to be engaged y the headed member of the piston.

6. In a rotary engine, a casing, a rotary element journa ed in said casing and provided with an annular chamber, an abutment fixed to the casing and disposed within said annular chamber, an inwardly projecting flange on the casing having undercut grooves at opposite sides thereof, packing rings carried by the rotary element and disposed within said undercut grooves, a sliding pis ton in the rotary element and extensible out into the annular chamber therein, and a track for guiding said piston beneath the abutment.

7. A combination like that set forth in claim 2, wherein the headed element consists of a shoe riding in the undercut track and pivoted on the outer end of a bolt carried by the piston.

8. In a rotary engine, a casing, a rotary element journaled in said casing and provided with longitudinally separated high and low pressure annular chambers, said high and low pressure chambers having abutments therein supported by the casing, sliding pistons mounted in the rotary element and extensible out into the high and low pressure chambers, tracks for guiding the pistons beneath the abutments, and con duits extending from the exhaust side of the high pressure chamber to the inlet side of the low pressure chamber.

9. In a rotary engine, a casing, a rotary element journaled in said casing and provided with longitudinally Separated high and low pressure annular chambers, said high and low pressure chambers having abutments therein supported by the casing, sliding pistons mounted in the rotary element and extensible out into the high and low pressure chambers, tracks for guiding the pistons beneath the abutments, conduits ex- Gopies of this patent may be obtained for tending from opposite sides of the abutment in the high pressure chamber to opposite sides of the abutment in the low pressure chamber, and valve mechanism for controlling said conduits.

JOHN SOLLAZZU.

five cents each, by addressing the Commissioner of Patents Washington, D. 0. 

